Multi-head F clamp

Abstract

The invention relates to the technical field of manual hardware tools, in particular to a multi-head F clamp which comprises a sliding rod of an F structure, a movable clamping foot capable of being adjusted in a sliding mode is assembled on the transverse structure part of the sliding rod, and a multi-head clamping mechanism is arranged on the portion, on the right side of the movable clamping foot, of the sliding rod. The multi-head clamping mechanism comprises a movable seat, the movable seat sleeves the sliding rod, cross arms are fixedly connected to the left side and the right side of the lower end of the movable seat, adjusting through grooves are formed in the cross arms, multiple sets of positioning grooves of arc-shaped structures are formed in the bottom of the inner wall of each adjusting through groove at equal intervals, movable arms are arranged on the lower sides of the two sets of cross arms, and hinge joints are fixedly arranged at the upper ends of the movable arms; the hinge joint is clamped at the bottom of the movable arm and rotationally connected with the movable arm through a rotating pin, and an adjustable limiting assembly is arranged on the upper side in the adjusting through groove. By additionally arranging the multi-head clamping mechanism, a plurality of different workpieces can be clamped at the same time, the clamping range is wide, and the working efficiency and the use convenience are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of manual hardware tools, in particular to a multi-head F clamp. Background Art

[0002] F clamp, full name woodworking clamp (F-type clamp), is a clamping tool commonly used in woodworking or wood processing. It is usually used to fix wood or other materials for cutting, drilling, grinding or other processing operations. F clamp usually consists of a fixed clamping foot (fixed arm) and a movable clamping foot (movable arm), which are connected by a screw or similar mechanism. When the screw is tightened, the movable arm moves closer to the fixed clamping foot, thereby clamping the material tightly.

[0003] The existing F clamp can usually only clamp a single workpiece during operation. When two or more workpieces need to be clamped at the same time, multiple F clamps must be used to clamp them separately, which not only increases the complexity of the operation, but also makes it extremely inconvenient to carry and use. Therefore, a new F clamp that can solve this problem is urgently needed in the market. Summary of the invention

[0004] In view of the existing shortcomings, the present invention provides a multi-head F clamp to solve the problem that the F clamp in the prior art can only clamp a single workpiece. The present invention can clamp multiple different workpieces at the same time through the additional multi-head clamping mechanism, and the clamping range is wide, which greatly improves the work efficiency and convenience of use.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A multi-head F clamp, comprising a sliding rod and a movable clamping foot of an F structure, wherein a slidably adjustable movable clamping foot is mounted on a transverse structural portion of the sliding rod, a first screw is threadedly connected through the lower end of the movable clamping foot, a first presser foot is mounted on the left end of the first screw, a first cross arm is penetrated through the right end of the first screw, and a multi-head clamping mechanism is arranged on the sliding rod on the right side of the movable clamping foot; The multi-head clamping mechanism comprises a movable seat, a movable arm, a second pressure foot, a second screw, a second cross arm, a cross arm and a limit assembly. The movable seat is sleeved on the sliding rod, and the left and right sides of the lower end of the movable seat are fixedly connected to the cross arm, an adjusting slot is provided inside the cross arm, and a plurality of groups of arc-shaped positioning slots are equidistantly provided on the bottom of the inner wall of the adjusting slot. A movable arm is provided on the lower side of the two groups of cross arms, and a hinge head is fixed on the upper end of the movable arm. The hinge head is clamped on the bottom of the movable arm and rotatably connected with the movable arm through a rotating pin, and the rotating pin is clamped in the positioning slot, and an adjustable limit assembly is provided on the upper side of the inner side of the adjusting slot, and a second screw is threaded through the lower ends of the two groups of movable arms, and a second pressure foot with the same specification as the first pressure foot is installed on the left end of the second screw, and a second cross arm is penetrated at the right end of the second screw.

[0006] Furthermore, the limit pressure assembly includes a connecting frame, a ball, a top plate, a supporting spring, a limit pressure block and a slot. A slot matching the turn pin is provided at the bottom of the limit pressure block, and the limit pressure block is clamped on the turn pin surface through the slot. A connecting frame with an inverted U-shaped structure is fixedly connected to the upper side of the limit pressure block, and the top surface of the inner wall of the connecting frame is fit-connected to the top surface of the cross arm. A supporting spring is fixedly connected to the upper surface of the limit pressure block, and a circular top plate is fixedly connected to the upper end of the support spring. A freely rotatable ball is embedded in the top plate, and the ball is in contact with the top surface of the adjustment slot.

[0007] Furthermore, a slide groove matched with the ball is provided on the top surface of the adjusting through groove, and the ball is inserted into the slide groove and is rollingly connected thereto.

[0008] Furthermore, the left and right edges of the positioning groove are rounded.

[0009] Furthermore, a jaw adapted to the slide bar is provided inside the movable seat, and the movable seat is sleeved on the slide bar through the jaw to be slidably connected thereto.

[0010] Furthermore, a blocking piece is clamped on the annular surface at the left end of the rotating pin, and the diameter of the blocking piece is larger than the diameter of the rotating pin.

[0011] Furthermore, the length of the second lead screw is greater than the length of the first lead screw.

[0012] Furthermore, a stop pin is fixedly provided on the slide rod near the right end.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The multi-head F clamp of the present invention can clamp multiple different workpieces at the same time through the multi-head clamping mechanism, thereby improving work efficiency.

[0014] 2. The multi-head F clamp of the present invention has a wide clamping range. The adjustment slot provided in the horizontal arm at the lower end of the movable seat provides space for adjusting the movable arm. By adjusting the positions of the two groups of movable arms on the multi-head clamping mechanism, it can adapt to workpieces of different sizes and shapes.

[0015] 3. The multi-head F clamp of the present invention is cleverly designed, compact in structure, and easy to carry and use.

[0016] 4. The multi-head F clamp of the present invention has strong versatility and can be installed on a ratchet F clamp or a common F clamp, thereby improving practicality.

[0017] 5. The multi-head F clamp of the present invention is provided with a limit assembly, which utilizes the directional elastic force of the support spring so that the limit pressing block can tightly clamp the rotating pin, thereby ensuring the stability of the movable arm after adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the sliding rod in the present invention.

[0020] Figure 3 It is a structural schematic diagram of the multi-head clamping mechanism in the present invention.

[0021] Figure 4 It is a schematic diagram of the disassembled structure of the multi-head clamping mechanism in the present invention.

[0022] Figure 5 It is a partial structural cross-sectional view of the present invention.

[0023] Figure 6 It is a schematic diagram of the use state of the present invention.

[0024] In the figure: 1. slide bar; 2. movable clamping foot; 3. multi-head clamping mechanism; 31. movable seat; 32. jaws; 33. movable arm; 34. second pressure foot; 35. second lead screw; 36. second cross arm; 37. cross arm; 38. limit assembly; 381. connecting frame; 382. ball bearing; 383. top plate; 384. slide groove; 385. support spring; 386. limit pressure block; 387. card slot; 39. adjustment slot; 310. positioning slot; 311. rotation pin; 312. hinge head; 4. stop pin; 5. first pressure foot; 6. first lead screw; 7. first cross arm. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Example: like Figures 1 to 6 As shown, a multi-head F clamp comprises a slide bar 1 of F structure and a movable clamping foot 2, wherein the lateral structure portion on the slide bar 1 is equipped with a slidably adjustable movable clamping foot 2, a first lead screw 6 is threadedly connected through the lower end of the movable clamping foot 2, a first presser foot 5 is installed at the left end of the first lead screw 6, a first cross arm 7 is passed through the right end of the first lead screw 6, and a multi-head clamping mechanism 3 is provided on the slide bar 1 on the right side of the movable clamping foot 2; The multi-head clamping mechanism 3 includes a movable seat 31, a movable arm 33, a second pressure foot 34, a second lead screw 35, a second cross arm 36, a cross arm 37 and a limit assembly 38. The movable seat 31 is sleeved on the slide rod 1. The left and right sides of the lower end of the movable seat 31 are fixedly connected with cross arms 37. An adjustment slot 39 is provided inside the cross arm 37. The bottom of the inner wall of the adjustment slot 39 is equidistantly provided with multiple groups of arc-shaped positioning slots 310. The lower sides of the two groups of cross arms 37 are both provided with movable arms 33. The upper ends of the movable arms 33 are fixed with hinge joints 312. The hinged head 312 is clamped at the bottom of the movable arm 33 and connected to it by rotation pin 311, and the rotation pin 311 is clamped in the positioning groove 310. An adjustable limit assembly 38 is provided on the upper side of the adjusting through groove 39. The lower ends of the two sets of movable arms 33 are both threaded with a second screw 35. The left end of the second screw 35 is installed with a second presser foot 34 with the same specifications as the first presser foot 5. The right end of the second screw 35 is penetrated with a second cross arm 36. This design solves the problem that the existing F clamp can usually only clamp a single workpiece during operation. When it is necessary to clamp two or more workpieces at the same time, multiple F clamps must be used to clamp them separately, which not only increases the complexity of the operation, but also makes it extremely inconvenient to carry and use.

[0027] In the embodiment, the present invention can clamp multiple different workpieces at the same time through the added multi-head clamping mechanism 3, and the clamping range is wide, which greatly improves the work efficiency and convenience of use, and the movable clamping foot 2 and the movable arm 33 in the multi-head clamping mechanism 3 can be flexibly adjusted to adapt to workpieces of different sizes and shapes.

[0028] In the embodiment, the limiting assembly 38 includes a connecting frame 381, a ball, a top plate 383, a support spring 385, a limiting pressure block 386 and a slot 387. The bottom of the limiting pressure block 386 is provided with a slot 387 adapted to the rotating pin 311. The limiting pressure block 386 is clamped on the surface of the rotating pin 311 through the slot 387. The design of the slot 387 enables the limiting pressure block 386 to be firmly clamped on the rotating pin 311, providing a stable limit for the movable arm 33, and will not affect the rotation of the rotating pin 311 and the movable arm 33. The upper side of the limiting pressure block 386 is fixedly connected to the connecting frame 381 with an inverted U-shaped structure, ensuring that the limiting pressure block 38 6 vertical stability, while allowing it to be moved and adjusted in the horizontal direction, and the top surface of the inner wall of the connecting frame 381 is closely connected with the top surface of the cross arm 37, and the upper surface of the limit pressing block 386 is fixedly connected with a support spring 385, which provides a continuous elastic force to ensure that the limit pressing block 386 is tightly pressed on the rotating pin 311 to prevent it from loosening or falling off, and the upper end of the support spring 385 is fixedly connected with a circular top plate 383, and a freely rotatable ball is embedded inside the top plate 383, and the ball is in contact with the top surface of the adjustment slot 39. The set ball can reduce friction, so that the limit pressing block 386 is smoother when adjusting. When the position of the movable arm 33 needs to be adjusted, the movable arm 33 is first pushed upward to make the rotating pin 311 on the movable arm 33 disengage from the positioning slot 310, and the limit assembly 38 is driven to move upward through the rotating pin 311 on the movable arm 33, and the support spring 385 in the limit assembly 38 is compressed. Then, the movable arm 33 is adjusted to the desired position, and the rotating pin 311 is inserted into the corresponding positioning groove 310. After the rotating pin 311 is inserted into the positioning groove 310, the limiting block in the limiting assembly 38 moves downward along with the rotating pin 311 under the directional elastic force of the supporting spring 385, and the supporting spring 385 provides a continuous elastic force to ensure that the limiting pressing block 386 is tightly pressed on the rotating pin 311, so as to achieve a stable limiting effect.

[0029] In the embodiment, the limit assembly 38 ensures the stability of the movable arm 33 after adjustment through the ingenious design of the slot 387, the ball and the support spring 385. At the same time, the design of the ball makes the limit assembly 38 smoother during adjustment, reducing friction and resistance. In addition, the limit assembly 38 enables the movable arm 33 to be positioned at the current position, thereby achieving a limiting effect on the movable arm 33, so that the movable arm 33 can be suitable for workpieces of different sizes and shapes.

[0030] In the embodiment, a slide groove 384 adapted to the ball is provided on the top surface of the adjustment slot 39, and the ball is inserted into the slide groove 384 and connected with the ball in a rolling manner. The ball and the slide groove 384 form a rolling connection instead of a sliding connection, which greatly reduces the friction resistance, making the limit assembly 38 smoother during adjustment, reducing wear and energy consumption. At the same time, the slide groove 384 plays a role in limiting and guiding the movement of the ball, preventing it from deviating during movement and affecting the adjustment effect.

[0031] In the embodiment, both the left and right edges of the positioning groove 310 are rounded. The rounded corner design can reduce the friction and collision between the rotating pin 311 and the groove edge when it is inserted into the positioning groove 310, thereby reducing wear. At the same time, the rounded edges make the rotating pin 311 smoother when inserted into the positioning groove 310, reducing jamming and improving the convenience of operation.

[0032] In the embodiment, a jaw 32 adapted to the slide bar 1 is provided inside the movable seat 31, and the movable seat 31 is sleeved on the slide bar 1 through the jaw 32 and slidably connected thereto. The movable seat 31 can be matched and connected to the slide bar 1 by the provided jaw 32, thereby ensuring the stable installation of the movable seat 31 on the slide bar 1 and preventing loosening or deviation caused by vibration or external force during use. At the same time, the cooperation between the jaw 32 and the slide bar 1 allows the movable seat 31 to slide smoothly on the slide bar 1. This sliding connection allows the user to easily adjust the position of the movable seat 31 as needed to adapt to workpieces of different sizes or shapes.

[0033] In the embodiment, a baffle is clamped on the left end annular surface of the rotating pin 311, and the diameter of the baffle is larger than the diameter of the rotating pin 311. The baffle 37 is provided to limit the rotating pin 311, and after the rotating pin 311 is inserted into the hinge joint 312, it can effectively prevent the rotating pin 311 from falling off or accidentally sliding out of the hinge joint 312, thereby ensuring the connection stability between the rotating pin 311 and the hinge joint 312.

[0034] In the embodiment, the length of the second lead screw 35 is greater than that of the first lead screw 6. This design enables the second presser foot 34 on the second lead screw 35 to move to a farther position, thereby expanding the clamping range of the F clamp, and the longer second lead screw 35 provides the user with a larger adjustment space, allowing the user to make more flexible clamping adjustments according to the size and shape of the workpiece, which helps to improve the accuracy and stability of clamping.

[0035] In the embodiment, a stop pin 4 is fixedly provided near the right end of the slide bar 1. The stop pin 4 serves to limit the movement of the components and prevent them from falling off. When the movable arm 33 moves to the rightmost end of the slide bar 1, the stop pin 4 stops it from moving further, thereby preventing the movable arm 33 from falling off the slide bar 1 due to excessive movement.

[0036] The working principle of this multi-head F clamp: The multi-head clamping mechanism 3 can be mounted on a ratchet F clamp for use, and can also be mounted on a common F clamp for use.

[0037] If it is installed on the ratchet F clamp, when in use, push the movable clamp foot 2 to make it reach a suitable opening amount, then hold the handle on the ratchet F clamp tightly to clamp the workpiece, and then adjust the movable seat 31 to make the movable arm 33 reach a suitable opening amount, screw the second cross arm 36 on the movable arm 33 to adjust the position of the second lead screw 35, and clamp other workpieces that need to be connected respectively through the second pressure foot 34 thereon, so as to achieve the effect of clamping multiple workpieces at the same time with one tool; If it is installed on an ordinary F clamp, when in use, push the movable clamp foot 2 to make it reach a suitable opening amount, then screw the first cross arm 7 on the movable clamp foot 2 to adjust the position of the first screw 6 to clamp the workpiece, then adjust the movable seat 31 to make the movable arm 33 reach a suitable opening amount, screw the second cross arm 36 on the movable arm 33 to adjust the position of the second screw 35, and clamp other workpieces that need to be connected through the second pressure foot 34 thereon, so as to achieve the effect of clamping multiple workpieces at the same time with one tool; When the position of the movable arm 33 needs to be adjusted, the movable arm 33 is first pushed upward to disengage the rotating pin 311 on the movable arm 33 from the positioning slot 310, and the rotating pin 311 on the movable arm 33 drives the limiting assembly 38 to move upward, and the support spring 385 in the limiting assembly 38 is compressed. Then, the movable arm 33 is adjusted to the desired position, and the rotating pin 311 is inserted into the corresponding positioning slot 310. After the rotating pin 311 is inserted into the positioning slot 310, the limiting block in the limiting assembly 38 moves downward following the rotating pin 311 under the directional elastic force of the support spring 385, and the support spring 385 provides continuous elastic force to ensure that the limiting pressure block 386 is tightly pressed on the rotating pin 311 to achieve a stable limiting effect.

[0038] To sum up, the multi-head F clamp of the present invention can clamp multiple different workpieces at the same time through the multi-head clamping mechanism 3, thereby improving work efficiency and having a wide clamping range. By adjusting the positions of the two groups of movable arms 33 on the multi-head clamping mechanism 3 and the clamping force of the screw, it can adapt to workpieces of different sizes and shapes. It has a clever design, a compact structure, is easy to carry and use, and has strong versatility. It can be installed on a ratchet F clamp or an ordinary F clamp, thereby improving practicality.

[0039] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A multi-head F clamp, comprising a sliding rod (1) of an F structure and a movable clamping foot (2), characterized in that: The upper transverse structural part of the slide bar (1) is equipped with a slidably adjustable movable clamping foot (2), the lower end of the movable clamping foot (2) is threaded with a first screw (6), the left end of the first screw (6) is equipped with a first pressure foot (5), the right end of the first screw (6) is threaded with a first cross arm (7), and the slide bar (1) on the right side of the movable clamping foot (2) is provided with a multi-head clamping mechanism (3); The multi-head clamping mechanism (3) comprises a movable seat (31), a movable arm (33), a second pressure foot (34), a second lead screw (35), a second cross arm (36), a cross arm (37) and a limit assembly (38). The movable seat (31) is sleeved on the slide rod (1). The left and right sides of the lower end of the movable seat (31) are fixedly connected to the cross arms (37). An adjusting slot (39) is provided inside the cross arm (37). The bottom of the inner wall of the adjusting slot (39) is provided with a plurality of groups of arc-shaped positioning slots (310) at equal intervals. The lower sides of the two groups of cross arms (37) are provided with movable arms (33). A hinged head (312) is fixedly provided at the upper end of the movable arm (33), the hinged head (312) is clamped at the bottom of the movable arm (33) and rotatably connected thereto via a rotating pin (311), and the rotating pin (311) is clamped into the positioning groove (310), an adjustable limit assembly (38) is provided on the upper side of the adjusting through groove (39), a second lead screw (35) is threadedly connected through the lower ends of the two groups of movable arms (33), a second presser foot (34) having the same specifications as the first presser foot (5) is installed at the left end of the second lead screw (35), and a second cross arm (36) is penetrated through the right end of the second lead screw (35).

2. The multi-head F clamp according to claim 1, characterized in that: The limiting assembly (38) comprises a connecting frame (381), a ball, a top sheet (383), a support spring (385), a limiting pressure block (386) and a clamping slot (387). The bottom of the limiting pressure block (386) is provided with a clamping slot (387) adapted to the rotating pin (311). The limiting pressure block (386) is clamped on the surface of the rotating pin (311) through the clamping slot (387). The upper side of the limiting pressure block (386) is fixedly connected to a connecting frame (381) with an inverted U-shaped structure, and the top surface of the inner wall of the connecting frame (381) is in contact with the top surface of the cross arm (37). The upper surface of the limiting pressure block (386) is fixedly connected to a support spring (385). The upper end of the support spring (385) is fixedly connected to a circular top sheet (383). A freely rotatable ball is embedded in the top sheet (383), and the ball is in contact with the top surface of the adjustment slot (39).

3. The multi-head F clamp according to claim 2, characterized in that: A slide groove (384) adapted to the ball bearing is provided on the top surface of the adjusting through groove (39), and the ball bearing is inserted into the slide groove (384) to be rollingly connected thereto.

4. The multi-head F clamp according to claim 1, characterized in that: The left and right edges of the positioning groove (310) are both rounded.

5. The multi-head F clamp according to claim 1, characterized in that: The movable seat (31) is provided with a jaw (32) adapted to the slide bar (1) inside, and the movable seat (31) is sleeved on the slide bar (1) through the jaw (32) to be slidably connected thereto.

6. The multi-head F clamp according to claim 1, characterized in that: A blocking piece is clamped on the annular surface at the left end of the rotating pin (311), and the diameter of the blocking piece is larger than the diameter of the rotating pin (311).

7. The multi-head F clamp according to claim 1, characterized in that: The length of the second screw (35) is greater than the length of the first screw (6).

8. The multi-head F clamp according to claim 1, characterized in that: A stop pin (4) is fixedly provided on the slide rod (1) near the right end.

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